.top-nav-box {
  height: 40px;
  width: 100%;
  background: #ff6c0c;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 10px;
  font-size: 16px;
  z-index: 2;
  // 粘性定位
  // position: sticky;
  // top: 0;
  // left: 0;
  > div:nth-of-type(2) {
    font-size: 18px;
    font-weight: bold;
  }
}
.top-nav-active-top {
  // position: fixed;
  // top: 0;
  // left: 0;

  // 粘性定位
  position: sticky;
  top: 0;
  left: 0;
}
